Laser Cutting Method, Device, Equipment and Storage Medium for Pipe with Welding Groove

Abstract

The present invention provides a method, device, equipment and storage medium for laser cutting of pipes with welding grooves, the method comprising: creating an auxiliary target workpiece of the target workpiece, obtaining the outer surface of the auxiliary target workpiece, intersecting the outer surface of the auxiliary target workpiece and the outer surface of the target pipe, and obtaining the outer contour of the material-removing shape of the target pipe; obtaining a plurality of first inner contour scatter points and the first outer contour scatter points of the outer contour corresponding to the first inner contour scatter points; obtaining each of the first inner contour scatter points and the corresponding second outer contour scatter points; fitting all the second outer contour scatter points to obtain an optimized outer contour; using the optimized outer contour as a cutting trajectory and the first cutting direction as the final cutting direction, executing a laser cutting program, and laser cutting the target pipe. Thus, a uniform welding groove can be maintained as much as possible with the welding surface of the target workpiece to be welded, so as to facilitate subsequent welding.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting processing, and particularly to a laser cutting method, device, equipment and storage medium for pipes with welding grooves. Background Art

[0002] In the field of metal cutting, for some blanking target effects, when the surfaces of two workpieces are butted together, they fit perfectly. In this way, parameters such as the assembly position, angle, and length will be very precise, and the assembly will also be very firm. Then, assembly processes such as welding are carried out.

[0003] When welding two workpieces, usually, the end face of one workpiece needs to be closely attached to the pipe surface of the other workpiece to be welded to maintain stable contact; and a sloped gap needs to be reserved on the outer surface part where they contact as the welding gap, so that during welding, solder is used to fill the welding gap to keep the welding firm. When the welding gap is uniform, the welding effect is not only firm but also beautiful. When the welding gap is uneven, it will cause corresponding troubles to welding and affect the welding quality.

[0004] Therefore, how to effectively equalize the welding gap during pipe fitting has become a technical problem that urgently needs to be solved at present. Summary of the Invention

[0005] The present invention provides a laser cutting method, device, equipment and storage medium for pipes with welding grooves to solve the problem of how to effectively equalize the welding gap during pipe fitting.

[0006] According to the first aspect of the present invention, a laser cutting method for pipes with welding grooves is provided, which is used to cut a groove for welding on a target pipe to weld the target pipe to a target workpiece. The method includes:

[0007] Obtain the outer surface of the target workpiece and the outer surface of the target pipe, and create an auxiliary target workpiece of the target workpiece based on the outer surface of the target workpiece;

[0008] Obtain the outer surface of the auxiliary target workpiece, perform an intersection operation on the outer surface of the auxiliary target workpiece and the outer surface of the target pipe to obtain the outer contour of the material-removing shape of the target pipe, and delete the auxiliary target workpiece; wherein, a groove gap is included between the outer contour and the outer surface of the target workpiece, and the groove gap is characterized by the angle that makes the cutting direction deviate along the direction away from the welding surface of the target workpiece; the material-removing shape is the shape of the intersection surface of the outer surface of the auxiliary target workpiece and the outer surface of the target pipe;

[0009] Obtain the initial inner contour of the material-removing shape of the target pipe;

[0010] Sample points are taken on the initial inner contour of the material removal shape to obtain a number of first inner contour scattered points;

[0011] Based on each first inner contour scattered point, a first outer contour scattered point of the outer contour corresponding to the first inner contour scattered point is obtained; wherein, the connection line between each first outer contour scattered point and the corresponding first inner contour scattered point points to the axis of the target pipe;

[0012] The connection line between each first inner contour scattered point and the corresponding first outer contour scattered point is used as the ideal cutting direction of each first inner contour scattered point; wherein, the cutting direction is characterized as the angle between the connection line between each first inner contour scattered point and the corresponding outer contour scattered point and the vertical plane of the target pipe, and the vertical plane is perpendicular to the axis of the target pipe;

[0013] Based on the ideal cutting direction of each first inner contour scattered point and the maximum mechanical swing angle, the second outer contour scattered point corresponding to each first inner contour scattered point is obtained;

[0014] All the second outer contour scattered points are fitted to obtain an optimized outer contour;

[0015] Taking the optimized outer contour as the cutting trajectory and the first cutting direction as the final cutting direction, a laser cutting program is executed to perform laser cutting on the target pipe to cut a welding groove on the target pipe; wherein, the first cutting direction is the ideal cutting direction or the maximum mechanical swing angle, and the maximum mechanical swing angle is the maximum angle between the cutting head of the laser cutting device and the vertical plane of the target pipe.

[0016] Optionally, the obtaining of the second outer contour scattered point corresponding to each first inner contour scattered point based on the ideal cutting direction of each first inner contour scattered point and the maximum mechanical swing angle further includes:

[0017] Obtain the maximum mechanical swing angle;

[0018] According to the relationship between the absolute value of the ideal cutting direction and the maximum mechanical swing angle, determine the first cutting direction and the second outer contour scattered point, wherein the absolute value of the first cutting direction is not greater than the maximum mechanical swing angle.

[0019] Optionally, the determining of the first cutting direction according to the relationship between the absolute value of the ideal cutting direction and the maximum mechanical swing angle includes:

[0020] If the absolute value of the ideal cutting direction is greater than the maximum mechanical swing angle, then take the maximum mechanical swing angle as the first cutting direction;

[0021] If the absolute value of the ideal cutting direction is less than or equal to the maximum mechanical swing angle, each first inner contour scatter point is extended along the ideal cutting direction to the outer surface of the target pipe to obtain corresponding second outer contour scatter points.

[0022] Optionally, determining the second outer contour scatter points according to the relationship between the absolute value of the ideal cutting direction and the maximum mechanical swing angle specifically includes:

[0023] If the absolute value of the ideal cutting direction is greater than the maximum mechanical swing angle, each first inner contour scatter point is extended along the maximum mechanical swing angle direction to the outer surface of the target pipe to obtain corresponding second outer contour scatter points;

[0024] If the absolute value of the ideal cutting direction is less than or equal to the maximum mechanical swing angle, the first outer contour scatter point corresponding to the first inner contour scatter point is used as the corresponding second outer contour scatter point.

[0025] Optionally, the shape of the auxiliary target workpiece matches the shape of the target workpiece, and the pipe diameter of the auxiliary target workpiece is greater than the pipe diameter of the target workpiece.

[0026] Optionally, the welding surface is a plane or a curved surface.

[0027] Optionally, the maximum mechanical swing angle is 45 degrees.

[0028] According to the second aspect of the present invention, a laser cutting device for pipes with a welding groove is provided, including an auxiliary workpiece creation unit, an outer contour determination unit, an acquisition unit, a first inner contour scatter point determination unit, a first outer contour scatter point determination unit, a cutting direction determination unit, a second outer contour scatter point determination unit, a fitting unit, and a cutting unit; wherein:

[0029] The auxiliary workpiece creation unit is configured to acquire the outer surface of the target workpiece and the outer surface of the target pipe, and create an auxiliary target workpiece of the target workpiece based on the outer surface of the target workpiece;

[0030] The outer contour determination unit is configured to acquire the outer surface of the auxiliary target workpiece, perform an intersection operation on the outer surface of the auxiliary target workpiece and the outer surface of the target pipe to obtain the outer contour of the material removal shape of the target pipe, and delete the auxiliary target workpiece; wherein, a groove gap is included between the outer contour and the outer surface of the target workpiece, and the groove gap represents an angle by which the cutting direction deviates away from the welding surface of the target workpiece; the material removal shape is the shape of the intersection surface of the outer surface of the auxiliary target workpiece and the outer surface of the target pipe;

[0031] The acquisition unit is configured to acquire the initial inner contour of the material removal shape of the target pipe;

[0032] The first inner contour scatter point determination unit is configured to sample the initial inner contour of the material removal shape to obtain a number of first inner contour scatter points;

[0033] The first outer contour scatter point determination unit is configured to, based on each first inner contour scatter point, obtain a first outer contour scatter point of the outer contour corresponding to the first inner contour scatter point; wherein, the connection line between each first outer contour scatter point and the corresponding first inner contour scatter point points to the axis of the target pipe;

[0034] The cutting direction determination unit is configured to use the connection line between each first inner contour scatter point and the corresponding first outer contour scatter point as the ideal cutting direction of each first inner contour scatter point; wherein, the cutting direction is characterized by the angle between the connection line between each first inner contour scatter point and the corresponding outer contour scatter point and the vertical plane of the target pipe, and the vertical plane is perpendicular to the axis of the target pipe;

[0035] The second outer contour scatter point determination unit is configured to obtain the second outer contour scatter point corresponding to each first inner contour scatter point based on the ideal cutting direction of each first inner contour scatter point and the maximum mechanical swing angle;

[0036] The fitting unit is configured to fit all the second outer contour scatter points to obtain an optimized outer contour;

[0037] The cutting unit is configured to use the optimized outer contour as the cutting trajectory and the first cutting direction as the final cutting direction to execute a laser cutting program to perform laser cutting on the target pipe to cut a welding groove on the target pipe; wherein, the first cutting direction is the ideal cutting direction or the maximum mechanical swing angle, and the maximum mechanical swing angle is the maximum angle between the cutting head of the laser cutting device and the vertical plane of the target pipe.

[0038] According to a third aspect of the present invention, there is provided an electronic device, including:

[0039] A processor;

[0040] And a memory for storing instructions executable by the processor;

[0041] Wherein, the processor realizes the steps in the first aspect and its optional methods by running the executable instructions.

[0042] According to a fourth aspect of the present invention, there is provided a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps in the first aspect and its optional methods are realized.

[0043] The laser cutting method for pipes with welding grooves provided by the present invention creates an auxiliary target workpiece for the target workpiece, and performs an intersection operation between the outer surface of the auxiliary target workpiece and the outer surface of the target pipe, thereby obtaining the outer contour of the material-removing shape of the target pipe, and obtaining the first outer contour points on the outer contour corresponding to each first inner contour point. The connection line between each first inner contour point and the corresponding first outer contour point is used as the ideal cutting direction for each first inner contour point; secondly, based on the relationship between the ideal cutting direction of the first inner contour points and the maximum mechanical swing angle, the corresponding second outer contour points for each first inner contour point are obtained. By fitting all the second outer contour points, an optimized outer contour is obtained. The optimized outer contour is used as the cutting trajectory, and the first cutting direction is used as the final cutting direction to execute the laser cutting program to perform laser cutting on the target pipe. Thus, while respecting the objective properties of laser cutting, the cutting surface obtained after laser cutting can be made to maintain a uniform welding groove as much as possible with the welding surface of the target workpiece to be welded, which is beneficial for subsequent welding.

[0044] In a further preferred embodiment, before using the optimized outer contour as the cutting trajectory and the first cutting direction as the final cutting direction to execute the laser cutting program to perform laser cutting on the target pipe, it further includes: obtaining the maximum mechanical swing angle; and determining the first cutting direction based on the relationship between the absolute value of the ideal cutting direction and the maximum mechanical swing angle, wherein the absolute value of the first cutting direction is not greater than the maximum mechanical swing angle. Thus, the solution of the present invention takes into account the limitations of the actual equipment, makes the absolute value of any cutting direction not greater than the maximum mechanical swing angle, and provides convenience for the final laser cutting. Description of the Drawings

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0046] Figure 1 It is a schematic diagram of a T-shaped splicing with the pipe inclined;

[0047] Figure 2 It is a schematic diagram of the target pipe with uneven welds caused by the existing cutting method;

[0048] Figure 3 It is a flowchart of the laser cutting method for pipes with welding grooves provided by an exemplary embodiment of the present invention;

[0049] Figure 4 It is a schematic diagram of a target pipe and a target workpiece that need to be T-shaped spliced provided by an embodiment of the present invention;

[0050] Figure 5 It is a schematic diagram of the intersection of an auxiliary target workpiece and a target workpiece after creating the auxiliary target workpiece provided by an embodiment of the present invention;

[0051] Figure 6 It is a schematic diagram of the outer contour of the material removal shape of the target pipe after deleting the auxiliary target workpiece provided by an embodiment of the present invention;

[0052] Figure 7 For according to Figure 6 A schematic diagram of the ideal cutting direction of the outer contour of the material removal shape in;

[0053] Figure 8 It is a schematic diagram of the effect obtained by cutting with the obtained optimized outer contour as the cutting trajectory and the ideal cutting direction as the final cutting direction;

[0054] Figure 9 It is a schematic diagram of the effect obtained by cutting with the obtained optimized outer contour as the cutting trajectory and the maximum mechanical swing angle or the ideal cutting direction as the final cutting direction;

[0055] Figure 10 It is a block diagram of a laser cutting device for pipes with a welding groove provided by an exemplary embodiment.

[0056] Figure 11 It is a schematic diagram of the structure of an electronic device where a laser cutting device for pipes with a welding groove provided by an exemplary embodiment is located. Detailed implementation manners

[0057] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0058] In the description, claims and the above drawings of the present invention, terms such as "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0059] The technical solution of the present invention will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0060] Before filing the present invention, the applicant has conducted sufficient research on the laser cutting of the target pipe, discovered the corresponding problems existing in the laser cutting of the target pipe, and conducted research and exploration based on the corresponding problems, and finally obtained the solution of this application. Specifically as follows:

[0061] In the field of metal cutting, in some cases, T-shaped splicing is required, where T-shaped splicing means that the axes of two pipe parts are in the same plane, and the end face of the first part contacts the pipe surface of the second part. T-shaped splicing includes vertical T-shaped splicing and inclined T-shaped splicing; among them, vertical T-shaped splicing means that the axes of two pipes are in the same plane and the axes are perpendicular; inclined T-shaped splicing means that the axes of two pipe parts are in the same plane and the axes are not perpendicular.

[0062] Figure 1 The schematic diagram of the inclined T-shaped splicing is shown, where the target pipe 20 and the target workpiece 10 are in an inclined T-shaped splicing, the end face of the target pipe 20 contacts the end face of the target workpiece 10, and they are welded and fixed. In actual operation, in order to splice the target pipe 20 and the target workpiece 10, a saddle-shaped opening needs to be cut on the target pipe 20 to contact the end face of the target workpiece 10.

[0063] For the saddle-shaped opening on the target pipe 20, the outer surface edge of the target pipe is the outer contour, and the inner surface edge is the inner contour. It can be considered that the contour is composed of countless points, and there is a corresponding rule between the inner points forming the inner contour and the outer points forming the outer contour. Usually, the connection line between the inner and outer points points to the axis of the target pipe.

[0064] According to the conventional laser cutting method, the laser cuts along the outer contour as the cutting path and the connection line between the inner and outer points as the cutting direction. This method will result in uneven welding gaps between the end face of the target pipe and the pipe surface of the target workpiece, which is not conducive to subsequent welding. Specifically, as Figure 2 shown, where a1 is the axis of the target pipe 20, a2 is a vertical plane perpendicular to the axis (the angle between the vertical plane and the cutting direction is the swing angle), and a3 is a cutting direction of the target workpiece 10. From Figure 2 it can be seen that the gaps obtained by this method are uneven. For example, the gap at b is particularly large, while the gaps at other places are relatively small. And further, the angle c reaches 55 degrees, which means that even if there is no gap at this place, the groove angle has reached 55 degrees, while the current maximum mechanical swing angle is usually 45 degrees, thus exceeding the maximum swing angle range and bringing difficulties to cutting.

[0065] In view of this, the present invention provides a laser cutting method for pipes with welding grooves, which is applied to various electronic devices. For example, the method can be directly applied to the device for performing workpiece cutting, or can be applied to a general computer and then output relevant tool paths for reference by the device for performing workpiece cutting. The present invention does not make specific restrictions on this.

[0066] The specific content is as follows:

[0067] Please refer to Figure 3 , Figure 3 which shows a flowchart of a laser cutting method for pipes with welding grooves provided by an exemplary embodiment of the present invention.

[0068] The laser cutting method for pipes with welding grooves is used to cut a welding groove on the target pipe to weld the target pipe to a target workpiece. The method may include the following specific steps S1 - S9:

[0069] Step 1: Obtain the outer surface of the target workpiece and the outer surface of the target pipe, and create an auxiliary target workpiece of the target workpiece based on the outer surface of the target workpiece.

[0070] In a specific embodiment, please refer to Figure 4 and Figure 5 , create the auxiliary target workpiece 3, the target workpiece 2 is passed through the auxiliary target workpiece; and the shape of the auxiliary target workpiece 3 matches the shape of the target workpiece 2, and the pipe diameter of the auxiliary target workpiece 3 is larger than the pipe diameter of the target workpiece 2. For example, if the target workpiece 2 is a round pipe, then the auxiliary target workpiece 3 is a round pipe with a pipe diameter larger than that of the target workpiece 2; if the target workpiece 2 is a rectangular pipe, then the auxiliary target workpiece 3 is a rectangular pipe with a pipe diameter larger than that of the target workpiece 2.

[0071] Step 2: Obtain the outer surface of the auxiliary target workpiece, perform an intersection operation on the outer surface of the auxiliary target workpiece and the outer surface of the target pipe to obtain the outer contour of the material-removing shape of the target pipe, and delete the auxiliary target workpiece.

[0072] Wherein, there is a groove gap between the outer contour and the outer surface of the target workpiece, and the groove gap is characterized by the angle that makes the cutting direction deviate along the direction away from the welding surface of the target workpiece; the material-removing shape is the shape of the intersection surface of the outer surface of the auxiliary target workpiece and the outer surface of the target pipe.

[0073] Specifically, the welding surface is a plane or a curved surface.

[0074] Step 3: Obtain the initial inner contour of the material-removing shape of the target pipe.

[0075] Specifically, please refer to Figure 5 and Figure 6 , Figure 5 For performing an intersection operation on the outer surface of the auxiliary target workpiece 3 and the outer surface of the target pipe 1 to obtain the outer contour 4 of the material-removing shape of the target pipe 1; Figure 6 For deleting the auxiliary target workpiece 3, obtaining the outer contour 4 and the initial inner contour 5, the gap between the outer contour 4 and the initial inner contour 5 is the groove gap, and in an ideal state, the groove gap is uniform, but in actual situations, the groove gap is non-uniform, and it is necessary to further optimize the outer contour to obtain a uniform groove gap.

[0076] In the above solution, the outer contour is obtained by intersecting the auxiliary target workpiece and the target pipe. Since the shape of the auxiliary target workpiece is the same as that of the target workpiece, therefore, the inner contour of the target pipe fits completely with the outer surface of the target workpiece, and there is a nearly uniform groove gap between the outer contour and the outer surface of the target workpiece.

[0077] Step 4: Sample the initial inner contour of the material-removing shape to obtain a number of first inner contour scattered points.

[0078] Step 5: Taking each first inner contour scattered point as a reference, obtain the first outer contour scattered point of the outer contour corresponding to the first inner contour scattered point; wherein, the connection line between each first outer contour scattered point and the corresponding first inner contour scattered point points to the axis of the target pipe.

[0079] Step 6: Use the line connecting each first inner contour scatter point and its corresponding first outer contour scatter point as the ideal cutting direction for each first inner contour scatter point; wherein, the cutting direction is characterized by the angle between the line connecting each first inner contour scatter point and its corresponding outer contour scatter point and the vertical plane of the target pipe, and the vertical plane is perpendicular to the axis of the target pipe.

[0080] In a specific embodiment, please refer to Figure 7 , sample points are taken on the initial inner contour 22, where B1 and B2 are the first inner contour scatter points, and C1 and C2 are the first outer contour scatter points; since the outer contour is obtained by the intersection of the auxiliary target workpiece and the target pipe, and all the first outer contour scatter points are distributed on the outer contour, the lines connecting B1 and C1 and B2 and C2 are the ideal cutting directions.

[0081] Step 7: Based on the ideal cutting direction of each first inner contour scatter point and the maximum mechanical swing angle, obtain the corresponding second outer contour scatter points for each first inner contour scatter point.

[0082] Step 8: Fit all the second outer contour scatter points to obtain an optimized outer contour.

[0083] In a preferred implementation manner, the determination of the second outer contour scatter points includes: if the absolute value of the ideal cutting direction is greater than the maximum mechanical swing angle, extend each first inner contour scatter point along the maximum mechanical swing angle direction to the outer surface of the target pipe to obtain the corresponding second outer contour scatter points;

[0084] if the absolute value of the ideal cutting direction is less than or equal to the maximum mechanical swing angle, extend each first inner contour scatter point along the ideal cutting direction to the outer surface of the target pipe to obtain the corresponding second outer contour scatter points.

[0085] Step 9: Use the optimized outer contour as the cutting trajectory and the first cutting direction as the final cutting direction, execute the laser cutting program to perform laser cutting on the target pipe to cut a welding groove on the target pipe; wherein, the first cutting direction is the ideal cutting direction or the maximum mechanical swing angle, and the maximum mechanical swing angle is the maximum angle between the cutting head of the laser cutting device and the vertical plane of the target pipe.

[0086] It can be seen that in the above solution, a cutting groove is formed between the target pipe and the target workpiece through the auxiliary target workpiece. Although the gap does not remain absolutely uniform, a relatively uniform gap is obtained, and the relationship between the maximum mechanical swing angle and the absolute value of the ideal cutting direction is further considered to obtain an optimized outer contour, ensuring the process feasibility of cutting and reducing the cutting difficulty.

[0087] As a preferred embodiment, the present invention takes into account the limitation of the maximum mechanical swing angle. Limited by the actual equipment, the maximum mechanical swing angle is usually limited. If it exceeds this maximum swing angle, it cannot be achieved in actual implementation. Based on this, in the preferred embodiment of the present invention, on the basis of the foregoing embodiment, before step S7, it further includes:

[0088] Step S70: Obtain the maximum mechanical swing angle;

[0089] Step S71: Determine the first cutting direction and the second outer contour scatter points according to the relationship between the absolute value of the ideal cutting direction and the maximum mechanical swing angle, wherein the absolute value of the first cutting direction is not greater than the maximum mechanical swing angle.

[0090] Further, step S71 determines the first cutting direction according to the relationship between the absolute value of the ideal cutting direction and the maximum mechanical swing angle, which specifically includes:

[0091] If the absolute value of the ideal cutting direction is greater than the maximum mechanical swing angle, then use the maximum mechanical swing angle as the first cutting direction.

[0092] Specifically, please refer to Figure 9 , for the first inner contour scatter point B6, since the ideal cutting directions are 57.5 degrees respectively, exceeding the maximum mechanical swing angle, the first cutting direction in this embodiment is the maximum mechanical swing angle direction.

[0093] In an example, the maximum mechanical swing angle is 45 degrees.

[0094] If the absolute value of the ideal cutting direction is less than or equal to the maximum mechanical swing angle, then use the ideal cutting direction as the first cutting direction.

[0095] Specifically, please refer to Figure 8 and Figure 9 , for the first inner contour scatter points B3, B4, and B5, since the absolute values of the ideal cutting directions are 1.43 degrees, 42.23 degrees, and 32.5 degrees respectively, not exceeding the maximum mechanical swing angle (usually 45 degrees), the first cutting direction in this embodiment is the ideal cutting direction.

[0096] By using the method provided by the embodiment of the present invention, a cutting groove is formed between the target pipe and the target workpiece after cutting, and the gap of the cutting groove is uniform, thereby facilitating subsequent welding and improving the firmness and aesthetics of subsequent welding.

[0097] Please refer to Figure 10, the present invention also provides a laser cutting device for pipes with welding grooves, including an auxiliary workpiece creation unit 601, an outer contour determination unit 602, an acquisition unit 603, a first inner contour scatter point determination unit 604, a first outer contour scatter point determination unit 605, a cutting direction determination unit 606, a second outer contour scatter point determination unit 607, a fitting unit 608, and a cutting unit 609; wherein.

[0098] The auxiliary workpiece creation unit 601 is configured to acquire the outer surface of the target workpiece and the outer surface of the target pipe, and create an auxiliary target workpiece of the target workpiece based on the outer surface of the target workpiece.

[0099] The outer contour determination unit 602 is configured to acquire the outer surface of the auxiliary target workpiece, intersect the outer surface of the auxiliary target workpiece and the outer surface of the target pipe to obtain the outer contour of the material-removing shape of the target pipe, and delete the auxiliary target workpiece; wherein, a groove gap is included between the outer contour and the outer surface of the target workpiece, and the groove gap is characterized as an angle that causes the cutting direction to deviate along a direction away from the welding surface of the target workpiece; the material-removing shape is the shape of the intersection surface of the outer surface of the auxiliary target workpiece and the outer surface of the target pipe.

[0100] The acquisition unit 603 is configured to acquire the initial inner contour of the material-removing shape of the target pipe.

[0101] The first inner contour scatter point determination unit 604 is configured to sample the initial inner contour of the material-removing shape to obtain a number of first inner contour scatter points.

[0102] The first outer contour scatter point determination unit 605 is configured to, based on each first inner contour scatter point, obtain a first outer contour scatter point of the outer contour corresponding to the first inner contour scatter point; wherein, the connection line between each first outer contour scatter point and the corresponding first inner contour scatter point points to the axis of the target pipe.

[0103] The cutting direction determination unit 606 is configured to use the connection line between each first inner contour scatter point and the corresponding first outer contour scatter point as the ideal cutting direction of each first inner contour scatter point; wherein, the cutting direction is characterized as the angle between the connection line between each first inner contour scatter point and the corresponding outer contour scatter point and the vertical plane of the target pipe, and the vertical plane is perpendicular to the axis of the target pipe.

[0104] The second outer contour scatter point determination unit 607 is configured to obtain each first inner contour scatter point and the corresponding second outer contour scatter point based on the ideal cutting direction of each first inner contour scatter point and the maximum mechanical swing angle.

[0105] The fitting unit 608 is configured to fit all the second outer contour scatter points to obtain an optimized outer contour.

[0106] The cutting unit 609 is configured to use the optimized outer contour as a cutting trajectory and the first cutting direction as the final cutting direction to execute a laser cutting program to perform laser cutting on the target pipe so as to cut a welding bevel on the target pipe; wherein, the first cutting direction is the ideal cutting direction or the mechanical maximum swing angle, and the mechanical maximum swing angle is the maximum angle between the cutting head of the laser cutting device and the vertical plane of the target pipe.

[0107] Please refer to Figure 11 , which provides an electronic device 7, including:

[0108] A processor 71; and,

[0109] A memory 72 for storing executable instructions of the processor;

[0110] Wherein, the processor 71 is configured to execute the methods involved above by executing the executable instructions.

[0111] The processor 71 can communicate with the memory 72 through a bus 73.

[0112] An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the methods involved above are implemented.

[0113] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above method embodiments; and the foregoing storage medium includes: various media such as ROM, RAM, magnetic disk or optical disc that can store program codes.

[0114] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser cutting method for pipes with welding grooves, characterized in that, Used to cut a welding groove on a target pipe to weld the target pipe to a target workpiece, the method includes: Obtain the outer surface of the target workpiece and the outer surface of the target pipe, and create an auxiliary target workpiece of the target workpiece based on the outer surface of the target workpiece; Obtain the outer surface of the auxiliary target workpiece, intersect the outer surface of the auxiliary target workpiece and the outer surface of the target pipe to obtain the outer contour of the material removal shape of the target pipe, and delete the auxiliary target workpiece; wherein, there is a groove gap between the outer contour and the outer surface of the target workpiece, and the groove gap is characterized by the angle that makes the cutting direction deviate along the welding surface away from the target workpiece; the material removal shape is the shape of the intersection surface of the outer surface of the auxiliary target workpiece and the outer surface of the target pipe; Obtain the initial inner contour of the material removal shape of the target pipe; Sample the initial inner contour of the material removal shape to obtain a number of first inner contour scattered points; Based on each first inner contour scattered point, obtain the first outer contour scattered point of the outer contour corresponding to the first inner contour scattered point; wherein, the connection line between each first outer contour scattered point and the corresponding first inner contour scattered point points to the axis of the target pipe; Use the connection line between each first inner contour scattered point and the corresponding first outer contour scattered point as the ideal cutting direction of each first inner contour scattered point; wherein, the cutting direction is characterized by the angle between the connection line between each first inner contour scattered point and the corresponding outer contour scattered point and the vertical plane of the target pipe, and the vertical plane is perpendicular to the axis of the target pipe; Based on the ideal cutting direction of each first inner contour scattered point and the mechanical maximum swing angle, obtain the second outer contour scattered point corresponding to each first inner contour scattered point; Fit all the second outer contour scattered points to obtain an optimized outer contour; Use the optimized outer contour as the cutting trajectory and the first cutting direction as the final cutting direction, and execute the laser cutting program to perform laser cutting on the target pipe to cut a welding groove on the target pipe; wherein, the first cutting direction is the ideal cutting direction or the mechanical maximum swing angle, and the mechanical maximum swing angle is the maximum angle between the cutting head of the laser cutting device and the vertical plane of the target pipe.

2. The laser cutting method for pipes with welding bevels according to claim 1, characterized in that, The obtaining the second outer contour scattered point corresponding to each first inner contour scattered point based on the ideal cutting direction of each first inner contour scattered point and the mechanical maximum swing angle further includes: Obtain the mechanical maximum swing angle; Determine the first cutting direction and the second outer contour scattered point according to the relationship between the absolute value of the ideal cutting direction and the mechanical maximum swing angle, wherein the absolute value of the first cutting direction is not greater than the mechanical maximum swing angle.

3. The laser cutting method for pipes with a welding groove according to claim 2, characterized in that The determining the first cutting direction according to the relationship between the absolute value of the ideal cutting direction and the mechanical maximum swing angle includes: If the absolute value of the ideal cutting direction is greater than the mechanical maximum swing angle, use the mechanical maximum swing angle as the first cutting direction; If the absolute value of the ideal cutting direction is less than or equal to the maximum mechanical swing angle, the ideal cutting direction is used as the first cutting direction.

4. The laser cutting method for pipes with welding grooves according to claim 3, characterized in that, Determining the second outer contour scatter points according to the relationship between the absolute value of the ideal cutting direction and the maximum mechanical swing angle, specifically: If the absolute value of the ideal cutting direction is greater than the maximum mechanical swing angle, each first inner contour scatter point is extended along the maximum mechanical swing angle direction to the outer surface of the target pipe to obtain the corresponding second outer contour scatter points; If the absolute value of the ideal cutting direction is less than or equal to the maximum mechanical swing angle, each first inner contour scatter point is extended along the ideal cutting direction to the outer surface of the target pipe to obtain the corresponding second outer contour scatter points.

5. The laser cutting method for pipes with a welding groove according to claim 1, characterized in that, The shape of the auxiliary target workpiece matches the shape of the target workpiece, and the pipe diameter of the auxiliary target workpiece is greater than the pipe diameter of the target workpiece.

6. The laser cutting method for pipes with welding grooves according to claim 1, characterized in that The welding surface is a plane or a curved surface.

7. The laser cutting method for a pipe with a welding groove according to claim 1, characterized in that, The maximum mechanical swing angle is 45 degrees.

8. A laser cutting device for pipes with a welding groove, characterized in that, It includes an auxiliary workpiece creation unit, an outer contour determination unit, an acquisition unit, a first inner contour scatter point determination unit, a first outer contour scatter point determination unit, a cutting direction determination unit, a second outer contour scatter point determination unit, a fitting unit, and a cutting unit; among them: The auxiliary workpiece creation unit is used to acquire the outer surface of the target workpiece and the outer surface of the target pipe, and create an auxiliary target workpiece of the target workpiece based on the outer surface of the target workpiece; The outer contour determination unit is used to acquire the outer surface of the auxiliary target workpiece, perform an intersection operation on the outer surface of the auxiliary target workpiece and the outer surface of the target pipe to obtain the outer contour of the material removal shape of the target pipe, and delete the auxiliary target workpiece; wherein, a groove gap is included between the outer contour and the outer surface of the target workpiece, and the groove gap is characterized as the angle by which the cutting direction deviates along the direction away from the welding surface of the target workpiece; the material removal shape is the shape of the intersection surface of the outer surface of the auxiliary target workpiece and the outer surface of the target pipe; The acquisition unit is used to acquire the initial inner contour of the material removal shape of the target pipe; The first inner contour scatter point determination unit is used to sample the initial inner contour of the material removal shape to obtain a number of first inner contour scatter points; The first outer contour scatter point determination unit is used to obtain the first outer contour scatter points of the outer contour corresponding to each first inner contour scatter point with each first inner contour scatter point as a reference; wherein, the connection line between each first outer contour scatter point and the corresponding first inner contour scatter point points to the axis of the target pipe; The cutting direction determination unit is used to use the connection line between each first inner contour scatter point and the corresponding first outer contour scatter point as the ideal cutting direction of each first inner contour scatter point; wherein, the cutting direction is characterized as the angle between the connection line between each first inner contour scatter point and the corresponding outer contour scatter point and the vertical plane of the target pipe, and the vertical plane is perpendicular to the axis of the target pipe; The second outer contour scatter point determination unit is configured to obtain each first inner contour scatter point and its corresponding second outer contour scatter point based on the ideal cutting direction and the mechanical maximum swing angle of each first inner contour scatter point; The fitting unit is configured to fit all the second outer contour scatter points to obtain an optimized outer contour; The cutting unit is configured to use the optimized outer contour as the cutting trajectory and the first cutting direction as the final cutting direction to execute a laser cutting program to perform laser cutting on the target pipe so as to cut a welding groove on the target pipe; wherein, the first cutting direction is the ideal cutting direction or the mechanical maximum swing angle, and the mechanical maximum swing angle is the maximum angle between the cutting head of the laser cutting device and the vertical plane of the target pipe.

9. An electronic device, characterized in that, Comprising: A processor; And a memory for storing instructions executable by the processor; Wherein, the processor implements the steps in the method according to any one of claims 1-7 by running the executable instructions.

10. A computer-readable storage medium, characterized in that, A computer program is stored thereon, and when the computer program is executed by the processor, the steps in the method according to any one of claims 1-7 are implemented.

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